renaming backend, cellxgene to server, client respectively

client/src/util/parseRGB.js

@@ -0,0 +1,31 @@
+// jshint esversion: 6
+import { scaleRGB } from "./scaleRGB";
+
+// maintain a cache of already parsed RGB names, as it is reasonably expensive
+// to do this operation.  This lets us have speed, but keep the pleasant ability
+// to talk about colors by their text description eg, 'rgb(0,0,1)'
+//
+const colorCache = new Object(null); // no prototype
+
+function parseColorName(c) {
+  if (c[0] !== "#") {
+    const _c = c.replace(/[^\d,.]/g, "").split(",");
+    return [scaleRGB(+_c[0]), scaleRGB(+_c[1]), scaleRGB(+_c[2])];
+  } else {
+    var parsedHex = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(c);
+    return [
+      scaleRGB(parseInt(parsedHex[1], 16)),
+      scaleRGB(parseInt(parsedHex[2], 16)),
+      scaleRGB(parseInt(parsedHex[3], 16))
+    ];
+  }
+}
+
+export const parseRGB = c => {
+  var cv = colorCache[c];
+  if (!cv) {
+    cv = parseColorName(c);
+    colorCache[c] = cv;
+  }
+  return cv;
+};